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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * arch/sh/kernel/setup.c
4 *
5 * This file handles the architecture-dependent parts of initialization
6 *
7 * Copyright (C) 1999 Niibe Yutaka
8 * Copyright (C) 2002 - 2010 Paul Mundt
9 */
10#include <linux/screen_info.h>
11#include <linux/ioport.h>
12#include <linux/init.h>
13#include <linux/initrd.h>
14#include <linux/console.h>
15#include <linux/root_dev.h>
16#include <linux/utsname.h>
17#include <linux/nodemask.h>
18#include <linux/cpu.h>
19#include <linux/pfn.h>
20#include <linux/fs.h>
21#include <linux/mm.h>
22#include <linux/kexec.h>
23#include <linux/module.h>
24#include <linux/smp.h>
25#include <linux/err.h>
26#include <linux/crash_dump.h>
27#include <linux/mmzone.h>
28#include <linux/clk.h>
29#include <linux/delay.h>
30#include <linux/platform_device.h>
31#include <linux/memblock.h>
32#include <linux/of.h>
33#include <linux/of_fdt.h>
34#include <linux/uaccess.h>
35#include <uapi/linux/mount.h>
36#include <asm/io.h>
37#include <asm/page.h>
38#include <asm/elf.h>
39#include <asm/sections.h>
40#include <asm/irq.h>
41#include <asm/setup.h>
42#include <asm/clock.h>
43#include <asm/smp.h>
44#include <asm/mmu_context.h>
45#include <asm/mmzone.h>
46#include <asm/sparsemem.h>
47
48/*
49 * Initialize loops_per_jiffy as 10000000 (1000MIPS).
50 * This value will be used at the very early stage of serial setup.
51 * The bigger value means no problem.
52 */
53struct sh_cpuinfo cpu_data[NR_CPUS] __read_mostly = {
54 [0] = {
55 .type = CPU_SH_NONE,
56 .family = CPU_FAMILY_UNKNOWN,
57 .loops_per_jiffy = 10000000,
58 .phys_bits = MAX_PHYSMEM_BITS,
59 },
60};
61EXPORT_SYMBOL(cpu_data);
62
63/*
64 * The machine vector. First entry in .machvec.init, or clobbered by
65 * sh_mv= on the command line, prior to .machvec.init teardown.
66 */
67struct sh_machine_vector sh_mv = { .mv_name = "generic", };
68EXPORT_SYMBOL(sh_mv);
69
70#ifdef CONFIG_VT
71struct screen_info screen_info;
72#endif
73
74extern int root_mountflags;
75
76#define RAMDISK_IMAGE_START_MASK 0x07FF
77#define RAMDISK_PROMPT_FLAG 0x8000
78#define RAMDISK_LOAD_FLAG 0x4000
79
80static char __initdata command_line[COMMAND_LINE_SIZE] = { 0, };
81
82static struct resource code_resource = {
83 .name = "Kernel code",
84 .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM,
85};
86
87static struct resource data_resource = {
88 .name = "Kernel data",
89 .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM,
90};
91
92static struct resource bss_resource = {
93 .name = "Kernel bss",
94 .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM,
95};
96
97unsigned long memory_start;
98EXPORT_SYMBOL(memory_start);
99unsigned long memory_end = 0;
100EXPORT_SYMBOL(memory_end);
101unsigned long memory_limit = 0;
102
103static struct resource mem_resources[MAX_NUMNODES];
104
105int l1i_cache_shape, l1d_cache_shape, l2_cache_shape;
106
107static int __init early_parse_mem(char *p)
108{
109 if (!p)
110 return 1;
111
112 memory_limit = PAGE_ALIGN(memparse(p, &p));
113
114 pr_notice("Memory limited to %ldMB\n", memory_limit >> 20);
115
116 return 0;
117}
118early_param("mem", early_parse_mem);
119
120void __init check_for_initrd(void)
121{
122#ifdef CONFIG_BLK_DEV_INITRD
123 unsigned long start, end;
124
125 /*
126 * Check for the rare cases where boot loaders adhere to the boot
127 * ABI.
128 */
129 if (!LOADER_TYPE || !INITRD_START || !INITRD_SIZE)
130 goto disable;
131
132 start = INITRD_START + __MEMORY_START;
133 end = start + INITRD_SIZE;
134
135 if (unlikely(end <= start))
136 goto disable;
137 if (unlikely(start & ~PAGE_MASK)) {
138 pr_err("initrd must be page aligned\n");
139 goto disable;
140 }
141
142 if (unlikely(start < __MEMORY_START)) {
143 pr_err("initrd start (%08lx) < __MEMORY_START(%x)\n",
144 start, __MEMORY_START);
145 goto disable;
146 }
147
148 if (unlikely(end > memblock_end_of_DRAM())) {
149 pr_err("initrd extends beyond end of memory "
150 "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
151 end, (unsigned long)memblock_end_of_DRAM());
152 goto disable;
153 }
154
155 /*
156 * If we got this far in spite of the boot loader's best efforts
157 * to the contrary, assume we actually have a valid initrd and
158 * fix up the root dev.
159 */
160 ROOT_DEV = Root_RAM0;
161
162 /*
163 * Address sanitization
164 */
165 initrd_start = (unsigned long)__va(start);
166 initrd_end = initrd_start + INITRD_SIZE;
167
168 memblock_reserve(__pa(initrd_start), INITRD_SIZE);
169
170 return;
171
172disable:
173 pr_info("initrd disabled\n");
174 initrd_start = initrd_end = 0;
175#endif
176}
177
178#ifndef CONFIG_GENERIC_CALIBRATE_DELAY
179void calibrate_delay(void)
180{
181 struct clk *clk = clk_get(NULL, "cpu_clk");
182
183 if (IS_ERR(clk))
184 panic("Need a sane CPU clock definition!");
185
186 loops_per_jiffy = (clk_get_rate(clk) >> 1) / HZ;
187
188 printk(KERN_INFO "Calibrating delay loop (skipped)... "
189 "%lu.%02lu BogoMIPS PRESET (lpj=%lu)\n",
190 loops_per_jiffy/(500000/HZ),
191 (loops_per_jiffy/(5000/HZ)) % 100,
192 loops_per_jiffy);
193}
194#endif
195
196void __init __add_active_range(unsigned int nid, unsigned long start_pfn,
197 unsigned long end_pfn)
198{
199 struct resource *res = &mem_resources[nid];
200 unsigned long start, end;
201
202 WARN_ON(res->name); /* max one active range per node for now */
203
204 start = start_pfn << PAGE_SHIFT;
205 end = end_pfn << PAGE_SHIFT;
206
207 res->name = "System RAM";
208 res->start = start;
209 res->end = end - 1;
210 res->flags = IORESOURCE_SYSTEM_RAM | IORESOURCE_BUSY;
211
212 if (request_resource(&iomem_resource, res)) {
213 pr_err("unable to request memory_resource 0x%lx 0x%lx\n",
214 start_pfn, end_pfn);
215 return;
216 }
217
218 /*
219 * We don't know which RAM region contains kernel data or
220 * the reserved crashkernel region, so try it repeatedly
221 * and let the resource manager test it.
222 */
223 request_resource(res, &code_resource);
224 request_resource(res, &data_resource);
225 request_resource(res, &bss_resource);
226#ifdef CONFIG_KEXEC
227 request_resource(res, &crashk_res);
228#endif
229
230 /*
231 * Also make sure that there is a PMB mapping that covers this
232 * range before we attempt to activate it, to avoid reset by MMU.
233 * We can hit this path with NUMA or memory hot-add.
234 */
235 pmb_bolt_mapping((unsigned long)__va(start), start, end - start,
236 PAGE_KERNEL);
237
238 memblock_set_node(PFN_PHYS(start_pfn), PFN_PHYS(end_pfn - start_pfn),
239 &memblock.memory, nid);
240}
241
242void __init __weak plat_early_device_setup(void)
243{
244}
245
246#ifdef CONFIG_OF_FLATTREE
247void __ref sh_fdt_init(phys_addr_t dt_phys)
248{
249 static int done = 0;
250 void *dt_virt;
251
252 /* Avoid calling an __init function on secondary cpus. */
253 if (done) return;
254
255#ifdef CONFIG_USE_BUILTIN_DTB
256 dt_virt = __dtb_start;
257#else
258 dt_virt = phys_to_virt(dt_phys);
259#endif
260
261 if (!dt_virt || !early_init_dt_scan(dt_virt)) {
262 pr_crit("Error: invalid device tree blob"
263 " at physical address %p\n", (void *)dt_phys);
264
265 while (true)
266 cpu_relax();
267 }
268
269 done = 1;
270}
271#endif
272
273void __init setup_arch(char **cmdline_p)
274{
275 enable_mmu();
276
277 ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);
278
279 printk(KERN_NOTICE "Boot params:\n"
280 "... MOUNT_ROOT_RDONLY - %08lx\n"
281 "... RAMDISK_FLAGS - %08lx\n"
282 "... ORIG_ROOT_DEV - %08lx\n"
283 "... LOADER_TYPE - %08lx\n"
284 "... INITRD_START - %08lx\n"
285 "... INITRD_SIZE - %08lx\n",
286 MOUNT_ROOT_RDONLY, RAMDISK_FLAGS,
287 ORIG_ROOT_DEV, LOADER_TYPE,
288 INITRD_START, INITRD_SIZE);
289
290#ifdef CONFIG_BLK_DEV_RAM
291 rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
292 rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
293 rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
294#endif
295
296 if (!MOUNT_ROOT_RDONLY)
297 root_mountflags &= ~MS_RDONLY;
298 init_mm.start_code = (unsigned long) _text;
299 init_mm.end_code = (unsigned long) _etext;
300 init_mm.end_data = (unsigned long) _edata;
301 init_mm.brk = (unsigned long) _end;
302
303 code_resource.start = virt_to_phys(_text);
304 code_resource.end = virt_to_phys(_etext)-1;
305 data_resource.start = virt_to_phys(_etext);
306 data_resource.end = virt_to_phys(_edata)-1;
307 bss_resource.start = virt_to_phys(__bss_start);
308 bss_resource.end = virt_to_phys(__bss_stop)-1;
309
310#ifdef CONFIG_CMDLINE_OVERWRITE
311 strlcpy(command_line, CONFIG_CMDLINE, sizeof(command_line));
312#else
313 strlcpy(command_line, COMMAND_LINE, sizeof(command_line));
314#ifdef CONFIG_CMDLINE_EXTEND
315 strlcat(command_line, " ", sizeof(command_line));
316 strlcat(command_line, CONFIG_CMDLINE, sizeof(command_line));
317#endif
318#endif
319
320 /* Save unparsed command line copy for /proc/cmdline */
321 memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
322 *cmdline_p = command_line;
323
324 parse_early_param();
325
326 plat_early_device_setup();
327
328 sh_mv_setup();
329
330 /* Let earlyprintk output early console messages */
331 early_platform_driver_probe("earlyprintk", 1, 1);
332
333#ifdef CONFIG_OF_FLATTREE
334#ifdef CONFIG_USE_BUILTIN_DTB
335 unflatten_and_copy_device_tree();
336#else
337 unflatten_device_tree();
338#endif
339#endif
340
341 paging_init();
342
343#ifdef CONFIG_DUMMY_CONSOLE
344 conswitchp = &dummy_con;
345#endif
346
347 /* Perform the machine specific initialisation */
348 if (likely(sh_mv.mv_setup))
349 sh_mv.mv_setup(cmdline_p);
350
351 plat_smp_setup();
352}
353
354/* processor boot mode configuration */
355int generic_mode_pins(void)
356{
357 pr_warning("generic_mode_pins(): missing mode pin configuration\n");
358 return 0;
359}
360
361int test_mode_pin(int pin)
362{
363 return sh_mv.mv_mode_pins() & pin;
364}
1/*
2 * arch/sh/kernel/setup.c
3 *
4 * This file handles the architecture-dependent parts of initialization
5 *
6 * Copyright (C) 1999 Niibe Yutaka
7 * Copyright (C) 2002 - 2010 Paul Mundt
8 */
9#include <linux/screen_info.h>
10#include <linux/ioport.h>
11#include <linux/init.h>
12#include <linux/initrd.h>
13#include <linux/bootmem.h>
14#include <linux/console.h>
15#include <linux/root_dev.h>
16#include <linux/utsname.h>
17#include <linux/nodemask.h>
18#include <linux/cpu.h>
19#include <linux/pfn.h>
20#include <linux/fs.h>
21#include <linux/mm.h>
22#include <linux/kexec.h>
23#include <linux/module.h>
24#include <linux/smp.h>
25#include <linux/err.h>
26#include <linux/crash_dump.h>
27#include <linux/mmzone.h>
28#include <linux/clk.h>
29#include <linux/delay.h>
30#include <linux/platform_device.h>
31#include <linux/memblock.h>
32#include <asm/uaccess.h>
33#include <asm/io.h>
34#include <asm/page.h>
35#include <asm/elf.h>
36#include <asm/sections.h>
37#include <asm/irq.h>
38#include <asm/setup.h>
39#include <asm/clock.h>
40#include <asm/smp.h>
41#include <asm/mmu_context.h>
42#include <asm/mmzone.h>
43#include <asm/sparsemem.h>
44
45/*
46 * Initialize loops_per_jiffy as 10000000 (1000MIPS).
47 * This value will be used at the very early stage of serial setup.
48 * The bigger value means no problem.
49 */
50struct sh_cpuinfo cpu_data[NR_CPUS] __read_mostly = {
51 [0] = {
52 .type = CPU_SH_NONE,
53 .family = CPU_FAMILY_UNKNOWN,
54 .loops_per_jiffy = 10000000,
55 .phys_bits = MAX_PHYSMEM_BITS,
56 },
57};
58EXPORT_SYMBOL(cpu_data);
59
60/*
61 * The machine vector. First entry in .machvec.init, or clobbered by
62 * sh_mv= on the command line, prior to .machvec.init teardown.
63 */
64struct sh_machine_vector sh_mv = { .mv_name = "generic", };
65EXPORT_SYMBOL(sh_mv);
66
67#ifdef CONFIG_VT
68struct screen_info screen_info;
69#endif
70
71extern int root_mountflags;
72
73#define RAMDISK_IMAGE_START_MASK 0x07FF
74#define RAMDISK_PROMPT_FLAG 0x8000
75#define RAMDISK_LOAD_FLAG 0x4000
76
77static char __initdata command_line[COMMAND_LINE_SIZE] = { 0, };
78
79static struct resource code_resource = {
80 .name = "Kernel code",
81 .flags = IORESOURCE_BUSY | IORESOURCE_MEM,
82};
83
84static struct resource data_resource = {
85 .name = "Kernel data",
86 .flags = IORESOURCE_BUSY | IORESOURCE_MEM,
87};
88
89static struct resource bss_resource = {
90 .name = "Kernel bss",
91 .flags = IORESOURCE_BUSY | IORESOURCE_MEM,
92};
93
94unsigned long memory_start;
95EXPORT_SYMBOL(memory_start);
96unsigned long memory_end = 0;
97EXPORT_SYMBOL(memory_end);
98unsigned long memory_limit = 0;
99
100static struct resource mem_resources[MAX_NUMNODES];
101
102int l1i_cache_shape, l1d_cache_shape, l2_cache_shape;
103
104static int __init early_parse_mem(char *p)
105{
106 if (!p)
107 return 1;
108
109 memory_limit = PAGE_ALIGN(memparse(p, &p));
110
111 pr_notice("Memory limited to %ldMB\n", memory_limit >> 20);
112
113 return 0;
114}
115early_param("mem", early_parse_mem);
116
117void __init check_for_initrd(void)
118{
119#ifdef CONFIG_BLK_DEV_INITRD
120 unsigned long start, end;
121
122 /*
123 * Check for the rare cases where boot loaders adhere to the boot
124 * ABI.
125 */
126 if (!LOADER_TYPE || !INITRD_START || !INITRD_SIZE)
127 goto disable;
128
129 start = INITRD_START + __MEMORY_START;
130 end = start + INITRD_SIZE;
131
132 if (unlikely(end <= start))
133 goto disable;
134 if (unlikely(start & ~PAGE_MASK)) {
135 pr_err("initrd must be page aligned\n");
136 goto disable;
137 }
138
139 if (unlikely(start < __MEMORY_START)) {
140 pr_err("initrd start (%08lx) < __MEMORY_START(%x)\n",
141 start, __MEMORY_START);
142 goto disable;
143 }
144
145 if (unlikely(end > memblock_end_of_DRAM())) {
146 pr_err("initrd extends beyond end of memory "
147 "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
148 end, (unsigned long)memblock_end_of_DRAM());
149 goto disable;
150 }
151
152 /*
153 * If we got this far in spite of the boot loader's best efforts
154 * to the contrary, assume we actually have a valid initrd and
155 * fix up the root dev.
156 */
157 ROOT_DEV = Root_RAM0;
158
159 /*
160 * Address sanitization
161 */
162 initrd_start = (unsigned long)__va(start);
163 initrd_end = initrd_start + INITRD_SIZE;
164
165 memblock_reserve(__pa(initrd_start), INITRD_SIZE);
166
167 return;
168
169disable:
170 pr_info("initrd disabled\n");
171 initrd_start = initrd_end = 0;
172#endif
173}
174
175void __cpuinit calibrate_delay(void)
176{
177 struct clk *clk = clk_get(NULL, "cpu_clk");
178
179 if (IS_ERR(clk))
180 panic("Need a sane CPU clock definition!");
181
182 loops_per_jiffy = (clk_get_rate(clk) >> 1) / HZ;
183
184 printk(KERN_INFO "Calibrating delay loop (skipped)... "
185 "%lu.%02lu BogoMIPS PRESET (lpj=%lu)\n",
186 loops_per_jiffy/(500000/HZ),
187 (loops_per_jiffy/(5000/HZ)) % 100,
188 loops_per_jiffy);
189}
190
191void __init __add_active_range(unsigned int nid, unsigned long start_pfn,
192 unsigned long end_pfn)
193{
194 struct resource *res = &mem_resources[nid];
195 unsigned long start, end;
196
197 WARN_ON(res->name); /* max one active range per node for now */
198
199 start = start_pfn << PAGE_SHIFT;
200 end = end_pfn << PAGE_SHIFT;
201
202 res->name = "System RAM";
203 res->start = start;
204 res->end = end - 1;
205 res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
206
207 if (request_resource(&iomem_resource, res)) {
208 pr_err("unable to request memory_resource 0x%lx 0x%lx\n",
209 start_pfn, end_pfn);
210 return;
211 }
212
213 /*
214 * We don't know which RAM region contains kernel data or
215 * the reserved crashkernel region, so try it repeatedly
216 * and let the resource manager test it.
217 */
218 request_resource(res, &code_resource);
219 request_resource(res, &data_resource);
220 request_resource(res, &bss_resource);
221#ifdef CONFIG_KEXEC
222 request_resource(res, &crashk_res);
223#endif
224
225 /*
226 * Also make sure that there is a PMB mapping that covers this
227 * range before we attempt to activate it, to avoid reset by MMU.
228 * We can hit this path with NUMA or memory hot-add.
229 */
230 pmb_bolt_mapping((unsigned long)__va(start), start, end - start,
231 PAGE_KERNEL);
232
233 memblock_set_node(PFN_PHYS(start_pfn),
234 PFN_PHYS(end_pfn - start_pfn), nid);
235}
236
237void __init __weak plat_early_device_setup(void)
238{
239}
240
241void __init setup_arch(char **cmdline_p)
242{
243 enable_mmu();
244
245 ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);
246
247 printk(KERN_NOTICE "Boot params:\n"
248 "... MOUNT_ROOT_RDONLY - %08lx\n"
249 "... RAMDISK_FLAGS - %08lx\n"
250 "... ORIG_ROOT_DEV - %08lx\n"
251 "... LOADER_TYPE - %08lx\n"
252 "... INITRD_START - %08lx\n"
253 "... INITRD_SIZE - %08lx\n",
254 MOUNT_ROOT_RDONLY, RAMDISK_FLAGS,
255 ORIG_ROOT_DEV, LOADER_TYPE,
256 INITRD_START, INITRD_SIZE);
257
258#ifdef CONFIG_BLK_DEV_RAM
259 rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK;
260 rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0);
261 rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
262#endif
263
264 if (!MOUNT_ROOT_RDONLY)
265 root_mountflags &= ~MS_RDONLY;
266 init_mm.start_code = (unsigned long) _text;
267 init_mm.end_code = (unsigned long) _etext;
268 init_mm.end_data = (unsigned long) _edata;
269 init_mm.brk = (unsigned long) _end;
270
271 code_resource.start = virt_to_phys(_text);
272 code_resource.end = virt_to_phys(_etext)-1;
273 data_resource.start = virt_to_phys(_etext);
274 data_resource.end = virt_to_phys(_edata)-1;
275 bss_resource.start = virt_to_phys(__bss_start);
276 bss_resource.end = virt_to_phys(_ebss)-1;
277
278#ifdef CONFIG_CMDLINE_OVERWRITE
279 strlcpy(command_line, CONFIG_CMDLINE, sizeof(command_line));
280#else
281 strlcpy(command_line, COMMAND_LINE, sizeof(command_line));
282#ifdef CONFIG_CMDLINE_EXTEND
283 strlcat(command_line, " ", sizeof(command_line));
284 strlcat(command_line, CONFIG_CMDLINE, sizeof(command_line));
285#endif
286#endif
287
288 /* Save unparsed command line copy for /proc/cmdline */
289 memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
290 *cmdline_p = command_line;
291
292 parse_early_param();
293
294 plat_early_device_setup();
295
296 sh_mv_setup();
297
298 /* Let earlyprintk output early console messages */
299 early_platform_driver_probe("earlyprintk", 1, 1);
300
301 paging_init();
302
303#ifdef CONFIG_DUMMY_CONSOLE
304 conswitchp = &dummy_con;
305#endif
306
307 /* Perform the machine specific initialisation */
308 if (likely(sh_mv.mv_setup))
309 sh_mv.mv_setup(cmdline_p);
310
311 plat_smp_setup();
312}
313
314/* processor boot mode configuration */
315int generic_mode_pins(void)
316{
317 pr_warning("generic_mode_pins(): missing mode pin configuration\n");
318 return 0;
319}
320
321int test_mode_pin(int pin)
322{
323 return sh_mv.mv_mode_pins() & pin;
324}